package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.heima.apis.article.IArticleClient;
import com.heima.apis.schedule.IScheduleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.file.MinIoTemplate;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.schedule.dto.Task;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.OcrUtil;
import com.heima.utils.ProtostuffUtil;
import com.heima.utils.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.AutoScanService;
import com.heima.wemedia.service.WmChannelService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmUserService;
import lombok.extern.slf4j.Slf4j;
import net.sourceforge.tess4j.TesseractException;
import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;
import org.checkerframework.checker.units.qual.A;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.*;
import java.util.stream.Collector;
import java.util.stream.Collectors;


@Service
@Slf4j
public class AutoScanServiceImpl implements AutoScanService {
    @Autowired
    private WmNewsService wmNewsService;

    @Autowired
    private MinIoTemplate minIoTemplate;

    @Autowired
    private GreenImageScan greenImageScan;

    @Autowired
    private GreenTextScan greenTextScan;

    @Autowired
    private IArticleClient articleClient;

    @Override
    @Async
    public void autoScanWmNews(Long newsId) throws Exception {
        //入参为空
        if (newsId == null){
            log.warn("newsId为空");
            return;
        }
        //1.查询新闻
        //1.1新闻为空---响应失败
        WmNews wmNews = wmNewsService.getById(newsId);
        if (wmNews == null){
            log.warn("新闻"+newsId+"为空");
            return;
        }
        //2提取新闻文字
        String title = wmNews.getTitle();
        String content = wmNews.getContent();
        String text = getText(title, content);

        //3.提取新闻图片
        String images = wmNews.getImages();
        List<byte[]> imageList = getImages(images,content);

        //0.通过DFA算法进行自建敏感词处理
        String textFromOcr = ocrCheck(imageList);
        text = text + "_" + textFromOcr;

        //0.使用DFA算法进行自建敏感词处理
        Boolean dfaResult = dfaCheck(text);
        if (!dfaResult){
            updateNews(2, "DFA审核没通过", null, newsId.intValue());
            return;
        }

        //4.调用文字审核接口
        Map textScan = greenTextScan.greeTextScan(text);
        Boolean textScanResult = checkResult(textScan, null, newsId.intValue());
        if (!textScanResult){
            log.warn("文字审核失败");
            return;
        }
        //5.调用图片审核接口
        Map imageScan = greenImageScan.imageScan(imageList);
        Boolean imageScanResult = checkResult(imageScan, null, newsId.intValue());
        if (!imageScanResult){
            log.warn("图片审核失败");
            return;
        }

        //6.远程调用articleClient保存文章
        //6.1判断响应结果是不是200
        ArticleDto dto = wmNews2ArticleDto(wmNews);
        ResponseResult responseResult = articleClient.saveArticle(dto);
        if (responseResult ==null||responseResult.getCode() != 200){
            log.warn("文章保存失败");
            return;
        }
        Long articleId =(Long) responseResult.getData();
        //7.将articleid回写到wmnews表中
        updateNews(9, "审核通过", articleId, newsId.intValue());
    }

    @Autowired
    private WmChannelService wmChannelService;

    @Autowired
    private WmUserService wmUserService;

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    private String ocrCheck(List<byte[]> images) throws TesseractException, IOException {
        if (CollectionUtils.isEmpty(images)){
            return "";
        }

        StringBuilder builder = new StringBuilder();
        for (byte[] image : images) {
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(image);
            BufferedImage read = ImageIO.read(byteArrayInputStream);
            String text = OcrUtil.doOcr(read);
            builder.append("_").append(text);
        }
        return builder.toString();
    }

    private Boolean dfaCheck(String text){
        if (StringUtils.isBlank(text)){
            return true;
        }

        //0.1调用敏感词mapper，查询所有敏感词
        QueryWrapper<WmSensitive> wrapper = new QueryWrapper<>();
        wrapper.select("sensitives");
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(wrapper);
        if (CollectionUtils.isEmpty(wmSensitives)){
            return true;
        }

        List<String> words = wmSensitives.stream().filter(Objects::nonNull).map(WmSensitive::getSensitives).collect(Collectors.toList());
        if (CollectionUtils.isEmpty(words)){
            return true;
        }
        //0.2DFA初始化
        SensitiveWordUtil.initMap(words);
        //0.3DFA敏感词匹配
        Map<String, Integer> result = SensitiveWordUtil.matchWords(text);

        //0.4判断结果
        return CollectionUtils.isEmpty(result);
    }

    public ArticleDto wmNews2ArticleDto(WmNews wmNews) {
        if (wmNews == null) {
            return null;
        }

        ArticleDto dto = new ArticleDto();
        BeanUtils.copyProperties(wmNews, dto);

        dto.setLayout(wmNews.getType());

        // 获取渠道名称
        Integer channelId = wmNews.getChannelId();
        if (channelId != null) {
            WmChannel channel = wmChannelService.getById(channelId);
            if (channel != null){
                dto.setChannelName(channel.getName());
            }
        }

        //获取作者名
        Integer userId = wmNews.getUserId();
        if (userId != null){
            dto.setAuthorId(userId.longValue());
            WmUser wmUser = wmUserService.getById(userId);
            if (wmUser != null){
                dto.setAuthorName(wmUser.getName());
            }
        }

        return dto;
    }

    //更新新闻状态
    private Boolean updateNews(Integer status,String reason,Long articleId,Integer newsId){
            WmNews wmNews = new WmNews();
            wmNews.setId(newsId);
            wmNews.setReason(reason);
            wmNews.setStatus(status.shortValue());
            if (articleId != null) {
                wmNews.setArticleId(articleId);
            }
            return wmNewsService.updateById(wmNews);

    }

    private Boolean checkResult(Map result,Long articleId,Integer newsId){
        if (CollectionUtils.isEmpty(result)){
            log.warn("审核结果为空");
            return true;
        }
        String suggestion =(String) result.get("suggestion");
        if ("pass".equals(suggestion)){
            return true;
        }else if ("block".equals(suggestion)){
            //更新wmnews状态
            updateNews(2,"未通过",articleId,newsId);
            return false;
        }else if ("review".equals(suggestion)){
            updateNews(3,"转人工审核",articleId,newsId);
            return false;
        }
        return true;
    }

    private List<byte[]> getImages(String images, String content) {
        List<String> finalList = new ArrayList<>();

        // 1. 提取封面图
        if (StringUtils.isNotEmpty(images)) {
            //  提取images里面的图片链接（,) split()
            String[] split = images.split(",");
            if (ArrayUtils.isNotEmpty(split)) {
                List<String> list = Arrays.asList(split);
                //加入到大的集合中
                finalList.addAll(list);
            }
        }

        // 2. 提取内容里面的图片

        if (StringUtils.isNotBlank(content)) {
            List<Map> maps = JSON.parseArray(content, Map.class);
            if (!CollectionUtils.isEmpty(maps)) {
                for (Map item : maps) {
                    if (CollectionUtils.isEmpty(item)) {
                        continue;
                    }
                    Object type = item.get("type");
                    if ("image".equals(type)) {
                        String value = (String) item.get("value");
                        finalList.add(value);
                    }
                }
            }
        }

            // 4. 把上面两组图片地址 合并在一起

            List<byte[]> result = new ArrayList<>();
            if (CollectionUtils.isEmpty(finalList)) {
                for (String url : finalList) {
                    if (StringUtils.isEmpty(url)) {
                        continue;
                    }
                    // 5. 借助minIO的download将string转为byte[]
                    byte[] bytes = minIoTemplate.downLoadFile(url);
                    result.add(bytes);
                }
            }
        // 6. 组装byte[]集合，并返回
        return result;

        }


    private  String getText(String title, String content){
        if (StringUtils.isNotBlank(content)){
            return title;
        }
        //1.提取content里面的文字内容
        List<Map> maps = JSON.parseArray(content, Map.class);
        if (CollectionUtils.isEmpty(maps)){
            return title;
        }
        StringBuilder builder = new StringBuilder();
        for (Map item : maps) {
            if (CollectionUtils.isEmpty(item)){
                continue;
            }
            Object type = item.get("type");
            if ("text".equals(type)){
                String value =(String) item.get("value");
                builder.append(value);
            }
        }

        //2.将content文字内容和title进行组合
        builder.append("_").append(title);

        //3.返回组合后的结果
        return builder.toString();
    }

    @Autowired
    private IScheduleClient scheduleClient;

    @Scheduled(fixedRate = 1000)
    public void getTask(){
        ResponseResult responseResult = scheduleClient.poll();
        if (responseResult==null||responseResult.getCode()!=200){
            log.warn("消费失败");
            return;
        }

        String data = (String) responseResult.getData();
        if (StringUtils.isEmpty(data)){
            log.warn("没有可消费的任务");
            return;
        }
        Task task = JSON.parseObject(data, Task.class);
        if (task==null){
            log.warn("没有可消费的任务");
            return;
        }

        byte[] parameters = task.getParameters();
        WmNews wmNews = ProtostuffUtil.deserialize(parameters, WmNews.class);
        if (wmNews==null){
            if (task==null){
                log.warn("参数缺失");
                return;
        }

            try {
                autoScanWmNews(wmNews.getId().longValue());
            } catch (Exception e) {
                e.printStackTrace();
            }
            }
        }

}
